The "knowledge economy" is a concept commonly deemed too ambiguous and elusive to hold any significance in current economic debate. This valuable book seeks to refute that myth. Presenting an important collection of views, from a number of leading scholars, this innovative volume visibly...

Airplanes were invented by hobbyists and experimenters, and some personal computers were as well. Similarly, many open-source software developers are interested in the software they make, and not focused on profit. Based on these cases, this paper has a model of agents called tinkerers who want...

We study an endogenous growth model where a profit-motivated R and D sector coexists with the introduction of free blueprints invented by philanthropists. These goods are priced at marginal cost, contrary to proprietary ones which are produced by a monopoly owned by the inventor. We show that...